AI-generatedMirissa at a glance
- Best time
- All year
- Warmest month
- Mar · 32°
- Warmest sea
- Apr · 29.6°
- Sunshine a year
- 2,390 h
- Rain a year
- 2,177 mm
- Climate
- Tropical
- Time zone
- UTC+5:30
- Elevation
- 13 m
Climate in Mirissa
Mirissa has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. March is the warmest month with average highs of 32 °C, while August is the coolest at 29 °C. With around 2,390 hours of sunshine a year, Mirissa is sunny; February is the sunniest month with 7.8 hours a day.
Holiday weather through the year
Best time to visit Mirissa
The best time to visit Mirissa is all year round. The sea reaches 29.6 °C in April, but frequent rain gets in the way of a classic beach holiday. The wettest month is November with 304 mm of precipitation.
Mirissa through the seasons
How the weather changes over the seasons, with averages for each.
Mirissa in spring
Mar – May
Good
- 31–32 °C by day
- Sea 29 °C
- 7.0 h of sun a day
- 74 rainy days in all
Mirissa in summer
Jun – Aug
Good
- 29–30 °C by day
- Sea 28 °C
- 6.6 h of sun a day
- 80 rainy days in all
Mirissa in autumn
Sep – Nov
Good
- 29–30 °C by day
- Sea 28 °C
- 5.7 h of sun a day
- 78 rainy days in all
Mirissa in winter
Dec – Feb
Good
- 30–31 °C by day
- Sea 28 °C
- 6.9 h of sun a day
- 50 rainy days in all
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
All year
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Mirissa for you.
Your best months: June – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Good
Best time to visit: all year
Where to go in OctoberSea temperature in October
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 27°
- Midday, 13:00: about 30°
- Afternoon, 16:00: about 29°
- Evening, 20:00: about 27°
- Night, 23:00: about 26°
05:5417:54
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:41–06:22 · evening 17:26–18:07
- Blue hour
- Morning 05:33–05:41 · evening 18:07–18:15
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Mirissa compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs rise from about 29° at the start of the month to 30° at the end.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 29° | 30° |
| Night-time low | 25° | 24° |
| Sea | 28° | 28° |
| Daylight | 12.1 h | 11.9 h |
What is the weather like in Mirissa in October?
In October, Mirissa is hot: daytime highs average 30 °C, and even at night it stays warm at around 25 °C. The sea averages 28.2 °C – lovely and warm for swimming. Expect around 5.8 hours of sunshine a day. It rains often – on about 26 days, adding up to 248 mm. On about 11 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Mirissa.
More details for October
- Daylight
- 12 h 0 min05:54 – 17:54
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 79 %on averageAll months
- Hot days
- 11 days30 °C or moreAll months
- Time zone
- UTC+5:30offset from UTC
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %47 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Compare two months in Mirissa
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
February has the better holiday weather in Mirissa: score 82 against 69. In February, days are 1 °C warmer than in October. The sea is about as warm in both months. February has 13 fewer rainy days. The sun shines 2 hours longer a day in February.
| Month | October | February |
|---|---|---|
| Holiday weather score | 69 | 82better |
| Daytime high | 30° | 31° |
| Night-time low | 25° | 24° |
| Sea | 28.2° | 28.2° |
| Sunshine | 5.8 h | 7.8 hbetter |
| Rainy days | 26 | 13better |
| Rainfall | 248 mm | 83 mmbetter |
| Muggy days | 31 | 28better |
Based on the climate averages 1996–2025.
Mirissa month by month
The typical weather for every month at a glance.
77January30° · Sea 28° · 7.0 h
In January, Mirissa is hot: daytime highs average 30 °C, and even at night it stays warm at around 23 °C. The sea averages 27.8 °C – lovely and warm for swimming. The sun shines for around 7.0 hours a day. It rains often – on about 16 days, adding up to 115 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is a good month for a holiday in Mirissa.
Mirissa in January82February31° · Sea 28° · 7.8 h
In February, Mirissa is hot: daytime highs average 31 °C, and even at night it stays warm at around 24 °C. The sea averages 28.2 °C – lovely and warm for swimming. The sun shines for around 7.8 hours a day. Rain is frequent, with about 13 rainy days and 83 mm in total. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is an excellent month for a holiday in Mirissa.
Mirissa in February71March32° · Sea 29° · 7.6 h
In March, Mirissa is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 29.0 °C – almost as warm as a bath. The sun shines for around 7.6 hours a day. It rains often – on about 20 days, adding up to 110 mm. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a good month for a holiday in Mirissa.
Mirissa in March70April32° · Sea 30° · 6.9 h
In April, Mirissa is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 29.6 °C – almost as warm as a bath. The sun shines for around 6.9 hours a day. It rains often – on about 26 days, adding up to 185 mm. On about 28 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is a good month for a holiday in Mirissa.
Mirissa in April71May31° · Sea 29° · 6.4 h
In May, Mirissa is hot: daytime highs average 31 °C, and even at night it stays warm at around 26 °C. The sea averages 28.8 °C – lovely and warm for swimming. Expect around 6.4 hours of sunshine a day. It rains often – on about 28 days, adding up to 230 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is a good month for a holiday in Mirissa.
Mirissa in May72June30° · Sea 28° · 6.6 h
In June, Mirissa is hot: daytime highs average 30 °C, and even at night it stays warm at around 26 °C. The sea averages 28.3 °C – lovely and warm for swimming. The sun shines for around 6.6 hours a day. It rains often – on about 27 days, adding up to 184 mm. On about 9 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a good month for a holiday in Mirissa.
Mirissa in June72July29° · Sea 28° · 6.6 h
In July, Mirissa is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 27.6 °C – lovely and warm for swimming. The sun shines for around 6.6 hours a day. It rains often – on about 26 days, adding up to 152 mm. On about 5 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a good month for a holiday in Mirissa.
Mirissa in July72August29° · Sea 28° · 6.6 h
In August, Mirissa is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 27.7 °C – lovely and warm for swimming. The sun shines for around 6.6 hours a day. It rains often – on about 26 days, adding up to 157 mm. The air is often humid and muggy. All in all, August is a good month for a holiday in Mirissa.
Mirissa in August71September29° · Sea 28° · 6.2 h
In September, Mirissa is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 27.9 °C – lovely and warm for swimming. Expect around 6.2 hours of sunshine a day. It rains often – on about 26 days, adding up to 201 mm. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Mirissa.
Mirissa in September69October30° · Sea 28° · 5.8 h
In October, Mirissa is hot: daytime highs average 30 °C, and even at night it stays warm at around 25 °C. The sea averages 28.2 °C – lovely and warm for swimming. Expect around 5.8 hours of sunshine a day. It rains often – on about 26 days, adding up to 248 mm. On about 11 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Mirissa.
Mirissa in October67November30° · Sea 29° · 5.2 h
In November, Mirissa is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 28.6 °C – lovely and warm for swimming. Expect around 5.2 hours of sunshine a day. It rains often – on about 25 days, adding up to 304 mm. On about 18 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, November is a good month for a holiday in Mirissa.
Mirissa in November69December30° · Sea 28° · 5.8 h
In December, Mirissa is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 28.2 °C – lovely and warm for swimming. Expect around 5.8 hours of sunshine a day. It rains often – on about 22 days, adding up to 208 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is a good month for a holiday in Mirissa.
Mirissa in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Mirissa
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Warm 20–24°
- Hot 24° and more
- muggy month (15+ muggy days)
HotOctober: nights around 25°. Hot nights: air conditioning makes sleeping much easier. Muggy on about 31 days (dew point 18 °C or more).
The coolest nights are in January (23°), the warmest in May (26°). Nights stay tropical all year (20 °C and more), so a room with air conditioning or at least a fan pays off. It is muggy (dew point 18 °C or more) all year, on about 365 days a year.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 77 | 30° | 23° | 27.8° | 7.0 h | 16 | 115 |
| FebruaryFeb | 82 | 31° | 24° | 28.2° | 7.8 h | 13 | 83 |
| MarchMar | 71 | 32° | 25° | 29.0° | 7.6 h | 20 | 110 |
| AprilApr | 70 | 32° | 25° | 29.6° | 6.9 h | 26 | 185 |
| MayMay | 71 | 31° | 26° | 28.8° | 6.4 h | 28 | 230 |
| JuneJun | 72 | 30° | 26° | 28.3° | 6.6 h | 27 | 184 |
| JulyJul | 72 | 29° | 25° | 27.6° | 6.6 h | 26 | 152 |
| AugustAug | 72 | 29° | 25° | 27.7° | 6.6 h | 26 | 157 |
| SeptemberSep | 71 | 29° | 25° | 27.9° | 6.2 h | 26 | 201 |
| OctoberOct | 69 | 30° | 25° | 28.2° | 5.8 h | 26 | 248 |
| NovemberNov | 67 | 30° | 24° | 28.6° | 5.2 h | 25 | 304 |
| DecemberDec | 69 | 30° | 24° | 28.2° | 5.8 h | 22 | 208 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
5.95° N, 80.46° E · 13 m · Asia/Colombo
Sea temperature
Sea temperature in Mirissa
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 27.6 – 28.7 °C
Swimming season: all year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Mirissa ranges from 27.6 °C in July to 29.6 °C in April. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea warms up slowly: it is warmest in April, while the air already peaks in March. The sea temperature varies from year to year: in April, eight out of ten years were between 28.8 and 30.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 27.8° | 27.3° | 28.4° | warm |
| FebruaryFeb | 28.2° | 27.7° | 28.7° | warm |
| MarchMar | 29.0° | 28.6° | 29.4° | very warm |
| AprilApr | 29.6° | 28.8° | 30.4° | very warm |
| MayMay | 28.8° | 28.3° | 29.5° | warm |
| JuneJun | 28.3° | 27.7° | 29.0° | warm |
| JulyJul | 27.6° | 27.1° | 28.4° | warm |
| AugustAug | 27.7° | 27.0° | 28.3° | warm |
| SeptemberSep | 27.9° | 27.3° | 28.4° | warm |
| OctoberOct | 28.2° | 27.6° | 28.7° | warm |
| NovemberNov | 28.6° | 28.0° | 29.1° | warm |
| DecemberDec | 28.2° | 27.8° | 28.6° | warm |
Sunshine
Sunshine hours in Mirissa
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.8 of 12.0 hours of daylight in Mirissa, 48 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Mirissa: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Mirissa has about 26 rainy days with 248 mm of rain in total.
UV index
UV index in Mirissa
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 13 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in September (UV 14).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Mirissa
How breezy and how cloudy Mirissa is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Mirissa typically peaks at 19 km/h during the day: Beaufort 3, gentle breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: May – Sep.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 79 % of the sky over Mirissa: mostly cloudy, with about 5.8 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Mirissa
How often the day gets hot in Mirissa (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Mirissa has about 11 hot days, with an average daytime high of 30 °C: often muggy. The air feels warmer than the thermometer says: light, airy clothes and slow days help.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to Mirissa
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Mirissa in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Mirissa has similar weather in all school holidays (scores 69 to 73).
- 70
Easter holidays
Mar – Apr
Good
- 32 °C by day
- Sea 29 °C
- 7.1 h of sun a day
- 24 rainy days a month
Keep in mind: Frequent rain
- 71
May half-term
May – Jun
Good
- 30 °C by day
- Sea 29 °C
- 6.4 h of sun a day
- 28 rainy days a month
Keep in mind: Frequent rain
- 72
Summer holidays
Jul – Aug
Good
- 29 °C by day
- Sea 28 °C
- 6.6 h of sun a day
- 26 rainy days a month
Keep in mind: Frequent rain
- 69
October half-term
Oct
Good
- 30 °C by day
- Sea 28 °C
- 5.8 h of sun a day
- 26 rainy days a month
Keep in mind: Frequent rain
- 73
Christmas holidays
Dec – Jan
Good
- 30 °C by day
- Sea 28 °C
- 6.4 h of sun a day
- 19 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h 10 min
- Distance
- 8,860 km
- Time zone
- UTC+5:30
- Jet lag
- About 5 days (5 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Sri Lanka
- Currency
- Sri Lankan Rupee (LKR)
- Languages
- Sinhala, Tamil
- Sockets
- Type D, G, M · 230 V
- Traffic
- Drives on the left
- Dialling code
- +94
UK plugs fit
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Mirissa compared
Put Mirissa side by side with another destination.
Mirissa vs Matara
In October the holiday weather in Mirissa and Matara is about equally good (score 69 vs 69). During the day it is about as warm in Matara as in Mirissa. The sea is about equally warm.
| in October | Mirissa | Matara |
|---|---|---|
| Holiday weather score | 69 | 69 |
| Daytime high | 30° | 30° |
| Sea | 28° | 28° |
| Sunshine | 6 h | 6 h |
| Rainy days | 26 | 26 |
| Best time | All year | All year |
Through the year
Best places in the country
Sri Lanka in October: the best places
In October, Mirissa ranks 1 of 22 destinations in this country.
- MirissaThis page30°28°69
- 2Matara30°28°69
- 3Galle30°28°69
- 4Hambantota31°28°69
- 5Negombo31°28°66
- 6Batticaloa32°29°66
- 7Bentota30°28°65
- 8Kalutara30°28°65
Places nearby
Near Mirissa
Other destinations close by.
Places with a similar climate
Places with a climate like Mirissa
Destinations whose weather through the year is closest to Mirissa's – good alternatives.
Frequently asked questions about Mirissa
When is the best time to visit Mirissa?
The best time to visit Mirissa is all year round. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Mirissa?
The sea temperature in Mirissa ranges from 27.6 °C in July to 29.6 °C in April. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Mirissa in October?
Yes. In October the sea averages 28.2 °C – lovely and warm for swimming.
What is the warmest month in Mirissa?
March is the warmest month, with average highs of 32 °C and nights around 25 °C. August is the coolest month at 29 °C.
When does it rain most in Mirissa?
The wettest month is November with 304 mm of precipitation. The driest month is February with 83 mm.
How many hours of sunshine does Mirissa get?
Mirissa gets around 2,390 hours of sunshine a year. The sunniest month is February with 7.8 hours a day; in November there are 5.2 hours a day.
What time zone is Mirissa in?
Mirissa is on UTC+5:30 all year.
How long is the flight from London to Mirissa?
A nonstop flight from London to Mirissa takes about 11 h 10 min, for a straight-line distance of about 8,860 km.
Which school holidays are best for Mirissa?
Mirissa has similar weather in all school holidays (scores 69 to 73). Holiday ratings (0–100): Easter holidays 70, May half-term 71, summer holidays 72, October half-term 69, Christmas holidays 73.